(1) be a nonprofit">nonprofit corporation;

(2) have succession until dissolved by an Act of Congress;

(3) not be an agent or instrumentality of the United States Government; and

(4) except as otherwise provided in this Act, be subject to, and have all the powers conferred upon a nonprofit">nonprofit corporation by the District of Columbia Nonprofit Corporation Act (D.C. Code, sec. 29y–1001 et seq.).